Development of a non-destructive method to study hydrogen behavior and hydrogen embrittlement resistance using muon spin relaxation spectroscopy

• Project/Area Number: 18H01747
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 26050:Material processing and microstructure control-related
• Research Institution: University of Toyama
• Principal Investigator: Nishimura Katsuhiko 富山大学, 学術研究部都市デザイン学系, 教授 (70218189)
• Co-Investigator(Kenkyū-buntansha): 松田 健二 富山大学, 学術研究部都市デザイン学系, 教授 (00209553) ; 赤丸 悟士 富山大学, 学術研究部理学系, 助教 (10420324)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2018: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
• Keywords: アルミニウム合金 / 水素脆性 / ミュオンスピン緩和法 / 原子空孔 / ナノクラスタ / 組織観察 / イオンガン / 第一原理計算 / 水素原子拡散 / ミュオンスピン緩和 / 原子クラスター / 材料組織 / 自然時効 / 水素原子挙動 / 非破壊評価 / 組織制御 / 材料加工 / 水素脆性抑制

Outline of Final Research Achievements

Since positive muons behave electrically like hydrogen ions in aluminum, they are trapped near the lattice positions where hydrogen is trapped, and thus provide information on the number and distance of hydrogen around the muon through magnetic interactions. The muon spin relaxation method, therefore, appears to be the best means of studying hydrogen kinetics in aluminum and aluminum alloys. The purpose of this study is to carry out muon spin relaxation experiments on pure aluminum and aluminum alloys with different hydrogen concentrations and establish a method for evaluating the concentration of hydrogen atoms in the interstitial lattice based on changes in the muon trapping rate. The lattice positions of hydrogen atoms will also be clarified via the change in spin relaxation rate which depends on the number and distance of hydrogen atoms around muons. We will search for elements that suppress hydrogen diffusion in aluminum alloys to prevent hydrogen embrittlement.

Academic Significance and Societal Importance of the Research Achievements

本研究では、アルミ合金に水素注入するイオンプラント装置を作製し、更に異なる３つの手法で水素注入を行い、それらの装置の性能評価を行った。水素注入したAl，Al-Cu，Al-Mg合金でゼロ磁場ミュオンスピン緩和実験を行い、ミュオンスピンと水素原子の磁気的相互作用に起因する緩和率の上昇を始めて観測した。また、Al-Mg-Si合金ではCu添加によってミュオン捕獲率が増加する現象を発見した。この研究成果は、アルミ合金中の水素拡散を抑制する手段を示唆している。これらは新規な研究成果であり、水素社会の安心・安全を確立する上で重要であり、産業界に大きなインパクトをもたらすと考える。

Research Products

• [Int'l Joint Research] Helmholtz Zentrum Berlin(ドイツ)
• [Int'l Joint Research] Materials and Nanotechnology, SINTEF/NTNU(ノルウェー)
• [Int'l Joint Research] University of New South Wales, Canberra(オーストラリア)
• [Journal Article] Magnetic property of Al-Mg alloys and intermetallic compounds (2021)
  • Author(s): Nishimura Katsuhiko、Imai Kosuke、Matsuda Kenji、Nunomura Norio、Tsuchiya Taiki、Isikawa Yosikazu、Adachi Hiroki、Hutchison Wayne D.
  • Journal Title: Journal of Alloys and Compounds Volume: 877 Pages: 160226-160226
  • DOI: 10.1016/j.jallcom.2021.160226
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Anisotropy of Magnetization and Specific Heat of TmTi₂Al₂₀ Single Crystal (2021)
  • Author(s): Namiki Takahiro、Matsumoto Yuki、Isikawa Yosikazu、Nishimura Katsuhiko
  • Journal Title: Journal of the Physical Society of Japan Volume: 90 Issue: 11
  • DOI: 10.7566/jpsj.90.114602
  • NAID: 210000159385
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Time Dependence of Muon Spin Relaxation Rate in Aluminum and Al-1.6%Mg<sub>2</sub>Si Alloy (2020)
  • Author(s): Nishimura Katsuhiko、Matsuda Kenji、Lee Seung Won、Watanabe Isao、Jawad Majed Abdel、Matsuzaki Teiichiro
  • Journal Title: Materials Science Forum Volume: 985 Pages: 10-15
  • DOI: 10.4028/www.scientific.net/msf.985.10
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Muon Spin Relaxation Study of Solute Vacancy Interactions During Natural Aging of Al-Mg-Si-Cu Alloys (2019)
  • Author(s): Sigurd Wenner, Calin D. Marioara, Katsuhiko Nishimura, Kenji Matsuda, Seungwon Lee, Takahiro Namiki, Isao Watanabe, Teiichiro Matsuzaki & Randi Holmestad
  • Journal Title: Metallurgical and Materials Transactions Ａ Volume: 50 Issue: 8 Pages: 3446-3451
  • DOI: 10.1007/s11661-019-05285-y
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Abnormally enhanced diamagnetism in Al-Zn-Mg alloys (2019)
  • Author(s): Nishimura Katsuhiko、Matsuda Kenji、Lee Seungwon、Nunomura Norio、Shimano Tomoki、Bendo Artenis、Watanabe Katsumi、Tsuchiya Taiki、Namiki Takahiro、Toda Hiroyuki、Yamaguchi Masatake
  • Journal Title: Journal of Alloys and Compounds Volume: 774 Pages: 405-409
  • DOI: 10.1016/j.jallcom.2018.10.037
  • NAID: 130008153845
  • Peer Reviewed
• [Journal Article] Critical concentrations of Zn and Mg for enhanced diamagnetism in Al-Zn-Mg alloys (2019)
  • Author(s): Nishimura Katsuhiko、Matsuda Kenji、Tsuchiya Taiki、Nunomura Norio、Bendo Artenis、Isikawa Yosikazu、Imai Kosuke、Adachi Hiroki、Hutchison Wayne D.
  • Journal Title: AIP Advances Volume: 9 Issue: 12 Pages: 125111-125111
  • DOI: 10.1063/1.5126972
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Time Dependence of Muon Spin Relaxation Rate in Aluminum and Al-1.6%Mg2Si Alloy (2019)
  • Author(s): Katsuhiko Nishimura, Kenji Matsuda, Seungwon Lee, Isao Watanabe, Majed Abdel Jawad, Teiichiro Matsuzaki
  • Journal Title: Scientific.net Volume: in press
  • Peer Reviewed
• [Journal Article] Muon spin relaxation study of solute vacancy interactions during natural aging of Al-Mg-Si-Cu alloys (2019)
  • Author(s): Sigurd Wenner, Calin D. Marioara, Katsuhiko Nishimura, Kenji Matsuda, Seungwon Lee, Takahiro Namiki, Isao Watanabe, Teiichiro Matsuzaki, and Randi Holmestad
  • Journal Title: Metallurgical and Materials Transactions A Volume: in press
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Muon spin relaxation experiments for Al-Mg and Al-Cu alloys (2021)
  • Author(s): Katsuhiko Nishimura, Kenji Matsuda , Norio Nunomura , Takahiro Namiki , Seungwon Lee, Satoshi Akamaru, Wataru Higemoto, Teiichiro Matsuzaki, Isao Watanabe
  • Organizer: ICPMAT2021 (Czech)
  • Int'l Joint Research
• [Presentation] Hydrogen Trapped Sites in Al-Mg and Al-Cu alloys studied by Muon Spin Relaxation Method (2021)
  • Author(s): K. Nishimura, K. Matsuda, N. Nunomura, T. Namiki, S. Lee, W. Higemoto, T. Tsuru, T. Matsuzaki, I. Watanabe, K. Shimizu, H. Toda
  • Organizer: Materials Research Meeting 2021 (Yokohama)
  • Int'l Joint Research
• [Presentation] Muon Spin Relaxation of a Hydrogen Charged Aluminum (2020)
  • Author(s): Katsuhiko Nishimura, Kenji Matsuda, Takahiro Namiki, Seungwon Lee, Wataru Higemoto, Yasuhiro Miyake, Goroh Itoh, Hiroyuki Toda
  • Organizer: The 17th International Conference on Aluminum Alloys ICAA17(Grenoble)
  • Int'l Joint Research
• [Presentation] 水素チャージしたAl-Cu，Al-Mg合金のミュオンスピン緩和測定 (2020)
  • Author(s): 西村克彦、松田健二、並木孝洋、李 昇原、土屋大樹、髭本 亘、三宅康博、戸田裕之、平山恭介、清水一行
  • Organizer: 軽金属学会第139回
• [Presentation] 水素チャージしたアルミ合金のミュオンスピン緩和測定 (2020)
  • Author(s): 西村克彦
  • Organizer: 京大複合研専門研究会「短寿命RIを用いた核分光と核物性研究Ⅵ」
• [Presentation] Muon Spin Relaxation of a Hydrogen Charged Aluminum (Plenary Lecture) (2019)
  • Author(s): Katsuhiko Nishimura
  • Organizer: International Conference on the Physical Properties and Application of Advanced Materials (Daegu, Republic of Korea, Sept. 1-4, 2109)
  • Int'l Joint Research / Invited
• [Presentation] Hydrogen Trapped Sites in Aluminum Alloys Studied by Zero-Field Muon Spin Relaxation Method (Oral) (2019)
  • Author(s): Katsuhiko Nishimura
  • Organizer: Materials Research Meeting 2019 (Yokohama, Dec. 10-14)
  • Int'l Joint Research
• [Presentation] 水素チャージしたAl-0.2%Cu合金のミュオンスピン緩和測定 (2019)
  • Author(s): 西村克彦，松田健二，並木孝洋，李昇原，赤丸悟士，髭本亘，三宅康博，戸田裕之，清水一行
  • Organizer: 軽金属学会第137回秋季大会(東京工業大学，2019)
• [Presentation] Al-Zn-Mg合金の自然時効における巨大反磁性 (2019)
  • Author(s): 今井康祐，西村克彦，松田健二，布村紀男，足立大樹
  • Organizer: 軽金属学会第137回秋季大会(東京工業大学，2019)
• [Presentation] 水素チャージしたアルミ合金のミュオンスピン緩和測定 (2019)
  • Author(s): 西村克彦，松田健二，布村紀男，三宅康博，髭本亘
  • Organizer: J-PARC MLF産業利用報告会（秋葉原コンベンションホール７月）
• [Presentation] Al-Zn-Mg合金に発現する巨大反磁性 (2019)
  • Author(s): 西村克彦，松田健二，布村紀男，石川義和，並木孝洋，足立大樹
  • Organizer: 日本物理学会2019秋季大会（岐阜大学、９月）
• [Presentation] Al-1.6%Mg2Siの自然時効におけるミュオンスピン緩和率の時間変化 (2019)
  • Author(s): 西村克彦，松田健二，布村紀男，李昇原，並木孝洋，渡邉功雄，松崎禎市郎
  • Organizer: 軽金属学会第165回春期大会（2019)
• [Presentation] Time Dependence of Muon Spin Relaxation Rate in Aluminum and Al-1.6%Mg2Si Alloy (2018)
  • Author(s): Katsuhiko Nishimura, Kenji Matsuda, Seungwon Lee, Isao Watanabe, Majed Abdel Jawad, and Teiichiro Matsuzak
  • Organizer: International Conference on the Physical Properties and Application of Advanced Materials
  • Int'l Joint Research / Invited
• [Presentation] ミュオンスピン緩和法によるAl-Mg-Si の自然時効におけるCu 添加効果 (2018)
  • Author(s): 西村克彦，松田健二，布村紀男，李昇原，並木孝洋，渡邉功雄，松崎禎市郎
  • Organizer: 軽金属学会第135回秋期大会（2018)
• [Presentation] ミュオンスピン緩和法によるアルミ合金中の水素原子挙動 (2018)
  • Author(s): 西村克彦、松田健二、布村紀男、渡邊功雄、髭本亘、三宅康博
  • Organizer: 短寿命RIを用いた核分光と核物性研究Ⅴ（京大原子炉）
• [Book] アルミニウム合金の熱処理とミュオン測定検討部会報告書 (2021)
  • Author(s): 松田健二、友野大、西村克彦、布村紀男、池田賢一、本間智之、立山真司、足立大樹、廣澤渉一、有賀康博、里達雄
  • Total Pages: 124
  • Publisher: 一般社団法人 軽金属学会